Yes there is Samsung Kies that you can update your phone with if an update is waiting for you. Some updates must be done through Samsung Kies. It is quite possible that you will have to use Kies on the PC to flash the update via USB cable.

The other alternative is to go find a known firmware for your phone, download it, and flash it using a PC application called Odin.

Odin also allows you to flash root files onto your phone which will then open the doorway to flashing custom roms made specifically for your phone.